<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>have_user.html
</head>
<body>
    <center>
      <h1>该用户已存在，请<a href="/myweb/reg.html">重新注册</a></h1>
    </center>
</body>
</html>